JP6670717B2 - Sensor, measuring device and measuring system - Google Patents

Description

  The present invention relates to a sensor, a measurement device, and a measurement system.

  2. Description of the Related Art Conventionally, there has been known a measuring device that includes a light emitting unit and a light receiving unit, irradiates a measurement unit such as a wrist of a subject with measurement light from the light emitting unit, and detects scattered light with the light receiving unit to measure biological information. (For example, see Patent Document 1).

JP-A-2002-360530

  In the conventional measurement device, depending on the arrangement of the light emitting unit that irradiates the measurement target with the measurement light and the light receiving unit that detects the scattered light from the test unit, due to the movement of the test unit, Measurement of biological information may be unstable.

  An object of the present invention, which has been made in view of such circumstances, is to provide a sensor, a measuring device, and a measuring system that can stably acquire biological information of a subject.

A sensor according to an embodiment of the present disclosure includes a light emitting unit that emits measurement light, a light receiving unit that detects scattered light corresponding to the measurement light, and a package on which the light emitting unit and the light receiving unit are mounted. Prepare. The package has a first recess and a second recess. The light emitting unit is mounted on a first bottom surface of the first recess. The light receiving unit is mounted on a second bottom surface of the second recess. The inclination angle of the first side surface of the first concave portion on the side closer to the second concave portion with respect to the first bottom surface is the same as that of the first side surface of the first concave portion on the second side surface farther from the second concave portion. It is smaller than the inclination angle to the bottom. An inclination angle of the second side surface with respect to the first bottom surface is smaller than 90 °.

A measurement device according to an embodiment of the present disclosure includes a sensor group including a plurality of sensors. The sensor includes a light emitting unit that emits measurement light, a light receiving unit that detects scattered light corresponding to the measurement light, and a package on which the light emitting unit and the light receiving unit are mounted. The package has a first recess and a second recess. The light emitting unit is mounted on a first bottom surface of the first recess. The light receiving unit is mounted on a second bottom surface of the second recess. The inclination angle of the first side surface of the first concave portion on the side closer to the second concave portion with respect to the first bottom surface is the same as that of the first side surface of the first concave portion on the second side surface farther from the second concave portion. It is smaller than the inclination angle to the bottom. An inclination angle of the second side surface with respect to the first bottom surface is smaller than 90 °.

A measurement system according to an embodiment of the present disclosure includes a measurement device and a server. The measurement device includes a sensor group including a plurality of sensors. The sensor includes a light emitting unit that emits measurement light, a light receiving unit that detects scattered light corresponding to the measurement light, and a package on which the light emitting unit and the light receiving unit are mounted. The measurement device includes a mounting unit to be mounted on a subject. The measurement device includes a control unit that detects biological information of the subject based on the scattered light. The server determines a physical condition of the subject based on biological information of the subject. The package has a first recess and a second recess. The light emitting unit is mounted on a first bottom surface of the first recess. The light receiving unit is mounted on a second bottom surface of the second recess. The inclination angle of the first side surface of the first concave portion on the side closer to the second concave portion with respect to the first bottom surface is the same as that of the first side surface of the first concave portion on the second side surface farther from the second concave portion. It is smaller than the inclination angle to the bottom. An inclination angle of the second side surface with respect to the first bottom surface is smaller than 90 °.

  According to the sensor, the measurement device, and the measurement system according to an embodiment of the present disclosure, it is possible to stably acquire biological information of a subject.

1 is a perspective view illustrating a configuration example of a measurement device according to a first embodiment. It is sectional drawing which shows the example of a structure of a sensor holding part. It is a top view showing the example of composition of a sensor. It is AA sectional drawing of FIG. It is sectional drawing which shows the structural example of the sensor holding part with which the test subject's body was mounted | worn. It is a functional block diagram showing an example of mounting on a rigid flexible board. FIG. 3 is a functional block diagram illustrating an example of mounting on a flexible substrate. It is a graph which shows the example of a pulse wave waveform. It is a flowchart which shows an example of the acquisition method of biometric information. 5 is a flowchart illustrating an example of a body state determination according to the first embodiment. FIG. 9 is a perspective view illustrating a configuration example of a measurement device according to a second embodiment. FIG. 12 is a functional block diagram of the measuring device of FIG. 11. It is a figure which shows an example of the pulse wave acquired in two places separated by predetermined distance. It is a flowchart which shows an example of the acquisition method of the biological information in a 2nd sensor group. 13 is a flowchart illustrating an example of a body state determination according to the second embodiment. FIG. 13 is a cross-sectional view illustrating a configuration example of a first concave portion according to Embodiment 3. FIG. 17 is a cross-sectional view illustrating a configuration example of a package having a first concave portion in FIG. 16. It is sectional drawing which shows the example of a structure of the package which has several 1st recessed parts. FIG. 14 is a functional block diagram illustrating a configuration example of a measurement system according to a fourth embodiment.

  Hereinafter, embodiments will be described in detail with reference to the drawings.

(Embodiment 1)
As shown in FIG. 1, the measuring device 100 includes a sensor holding unit 110, a notification unit 130, and a mounting unit 140.

  The measuring device 100 is mounted on the body of the subject by the mounting unit 140. The body of the subject may be, for example, the arm, wrist or ankle of the subject. The mounting portion 140 may be a band including a resin such as rubber, for example. The mounting section 140 may be in the form of a clip or the like. The mounting unit 140 may have various forms so that the measuring device 100 can be mounted on the body of the subject.

  The measurement device 100 acquires the biological information of the subject. The measurement device 100 displays or notifies the subject of the information related to the biological information by the notification unit 130.

  As shown in FIGS. 1 and 2, the sensor holding unit 110 includes an exterior member 112, a sensor buffer member 114, a test portion buffer member 116, and a sensor group 120. A sensor cushioning member 114 and a test portion cushioning member 116 are attached to the exterior member 112. The exterior member 112 may be made of resin, metal, or the like. The sensor buffer member 114 may be a member having elasticity. The sensor buffering member 114 may be a member that does not hinder the deformation of the sensor group 120. The sensor buffering member 114 may be made of, for example, sponge or rubber.

  The test portion buffer member 116 comes into contact with the body of the subject with a predetermined pressure when the measuring device 100 is mounted. The predetermined pressure may be smaller than the pressure applied when blood pressure is measured by the cuff sphygmomanometer, for example. The predetermined pressure may be less than 80 mmHg. The predetermined pressure is not limited to these, and may be arbitrarily determined. The test portion buffer member 116 may be formed of a member having elasticity. The test portion buffer member 116 may be formed of a member having a small elastic coefficient. The test portion buffer member 116 may be made of, for example, sponge or rubber.

  The sensor group 120 is attached to the exterior member 112 via the sensor buffering member 114. The sensor group 120 includes a plurality of sensors 200 and a common flexible substrate 250. The sensor 200 is mounted on the flexible substrate 250. The flexible substrate 250 has flexibility. The flexible substrate 250 may include a resin material. The flexible substrate 250 may be a film. Although the number of sensors 200 included in the sensor group 120 in FIG. 2 is three, it may be two or four or more.

  As shown in FIGS. 2 to 4, the sensor 200 includes a package 210, a light emitting unit 220, a light receiving unit 230, and a cover 240.

  The package 210 may be made of, for example, an insulating ceramic material. The package 210 may be made of another material such as an insulating resin.

  The package 210 has a base part 217 and a mounting part 218. The base part 217 is a part where the package 210 is attached to the flexible substrate 250. The mounting section 218 is located on the opposite side of the base section 217. The mounting portion 218 is located on the opposite side of the flexible substrate 250 in a state where the package 210 is mounted on the flexible substrate 250. The light emitting unit 220 and the light receiving unit 230 are mounted on the mounting unit 218.

  The mounting part 218 has a first concave part 214 and a second concave part 216. The first concave portion 214 and the second concave portion 216 are constituted by a side surface and a bottom surface. The side surface of the first recess 214 includes a first side surface 214a and a second side surface 214b. The bottom surface of the first recess 214 is shown as a first bottom surface 214c. The first side surface 214a is a side surface closer to the second concave portion 216. The second side surface 214b is a side surface farther from the second recess 216. The side surface of the second recess 216 includes a third side surface 216a and a fourth side surface 216b. The bottom surface of the second recess 216 is shown as a second bottom surface 216c. The third side surface 216a is a side surface closer to the first recess 214. The fourth side surface 216b is a side surface far from the first recess 214.

  In FIG. 3, the first bottom surface 214c and the second bottom surface 216c are rectangular, but are not limited thereto. The first bottom surface 214c and the second bottom surface 216c may have a polygonal shape or a shape surrounded by a curve. In FIG. 3, the number of side surfaces of each of the first concave portion 214 and the second concave portion 216 is four, but is not limited thereto. The number of side surfaces may be a number corresponding to the shape of the first bottom surface 214c and the second bottom surface 216c. The side surfaces of the first concave portion 214 and the second concave portion 216 may be formed as curved surfaces along the shapes of the first bottom surface 214c and the second bottom surface 216c, respectively. In each of the first concave portion 214 and the second concave portion 216, the first bottom surface 214c, the second bottom surface 216c, and the side surface may be smoothly connected. When there are a plurality of side surfaces, the respective side surfaces may be smoothly connected to each other.

  Each side surface of the first concave portion 214 is inclined at a predetermined angle with respect to the first bottom surface 214c. Each side surface of the first concave portion 214 may be substantially orthogonal to the first bottom surface 214c. Each side surface of the second concave portion 216 is inclined at a predetermined angle with respect to the second bottom surface 216c. Each side surface of the second concave portion 216 may be substantially orthogonal to the second bottom surface 216c.

  Each side surface of the first concave portion 214 may be covered with the metallized layer 212. The first bottom surface 214c may be covered with the metallization layer 212. The second bottom surface 216c may be covered with the metallization layer 212. Each side surface of the second concave portion 216 may be covered with the metallized layer 212. The metallization layer 212 is formed on the surface of the package 210 by, for example, a metallization process. Metallization layer 212 contains a metal material. The reflectance of light on the surface covered with the metallization layer 212 may be higher than the reflectance of light on the surface not covered with the metallization layer 212. The metallization layer 212 may be embedded inside the package 210 and connected to at least one of the first bottom surface 214c and the second bottom surface 216c.

  The light emitting unit 220 is mounted on the first bottom surface 214c of the first recess 214. The light emitting section 220 includes light emitting elements 220a and 220b. The light emitting elements 220a and 220b may be, for example, light emitting diodes or laser diodes. The light emitting diode is also called an LED (Light emitting diode). A laser diode is also called an LD (Laser Diode). The light emitting elements 220a and 220b may be electrically connected in series or in parallel. In FIG. 3, the number of light emitting elements provided in the light emitting section 220 is two, but may be one or three or more.

  The light emitting unit 220 may emit light having a predetermined wavelength. The light emitting unit 220 may emit light having a predetermined wavelength, for example, in the range of 495 to 570 nm. Light having a wavelength in the range of 495-570 nm is also referred to as green light. The light emitting unit 220 may emit light having a predetermined wavelength, for example, in the range of 620 to 750 nm. Light having a wavelength in the range of 620 to 750 nm is also referred to as red light. The light emitting unit 220 may emit light having a predetermined wavelength, for example, in the range of 750 to 1600 nm. Light having a wavelength in the range of 750 to 1600 nm is also referred to as near-infrared light. Long wavelength light can penetrate deeper into the body than short wavelength light.

  The light receiving section 230 is mounted on the second bottom surface 216c of the second recess 216. The light receiving section 230 includes a light receiving element. The light receiving element may be, for example, a photodiode or a phototransistor. The photodiode is also called a PD (Photo-Diode). The phototransistor is also called PT (Photo-Transistor). The light receiving element may have a characteristic of increasing sensitivity to light of a predetermined wavelength emitted from the light emitting unit 220. The light receiving section 230 may include two or more light receiving elements. The light receiving element outputs a voltage signal, a current signal, or the like according to the intensity of the received light. The voltage signal or the current signal output by the light receiving element of the light receiving unit 230 of the sensor 200 is also referred to as the output of the sensor 200.

  The cover 240 covers the mounting portion 218 of the package 210. The cover 240 has a property of transmitting light having a predetermined wavelength emitted from the light emitting unit 220. The cover 240 may have a property of cutting light having a wavelength other than the predetermined wavelength. The cover 240 may be made of, for example, resin such as plastic, glass, or the like.

  As shown in FIG. 5, when the measurement device 100 is mounted on the body of the subject by the mounting unit 140, the sensor holding unit 110 is pressed against the body surface 310 of the subject. The test portion buffer member 116 applies a predetermined pressure to the body surface 310 of the subject. The flexible substrate 250 bends along the shape of the body surface 310 of the subject. The sensor buffer member 114 is compressed and deformed according to the bending of the flexible substrate 250. Due to the deformation of the flexible substrate 250 and the sensor cushioning member 114, each sensor 200 of the sensor group 120 is mounted such that the surface on which the light emitting unit 220 and the light receiving unit 230 are mounted is along the body surface 310 of the subject. Inside the body surface 310 of the subject, there is an artery 330 via the subcutaneous tissue 320.

  The artery 330 extends in a direction perpendicular to the plane of FIG. The plurality of sensors 200 are arranged in a direction intersecting the direction in which the artery 330 extends. In other words, the plurality of sensors 200 are arranged in a direction crossing the artery 330 of the subject in a state where the measuring device 100 is mounted on the body of the subject by the mounting unit 140. The direction in which the plurality of sensors 200 are arranged may be the same as or different from the direction in which the light emitting unit 220 and the light receiving unit 230 of the plurality of sensors 200 are arranged.

  The light emitting section 220 of each sensor 200 emits the measurement light 340. At least a part of the measurement light 340 enters from the body surface 310, passes through the subcutaneous tissue 320, is scattered by the artery 330, and becomes scattered light 350 corresponding to the measurement light 340. At least a part of the scattered light 350 enters the light receiving section 230 of each sensor 200. The light receiving unit 230 on which the scattered light 350 is incident may be the light receiving unit 230 of the sensor 200 that has emitted the measurement light 340, or may be the light receiving unit 230 of another sensor 200. The light receiving unit 230 detects biological information of the subject based on the incident scattered light 350. The detected biological information is also referred to as biological information of the sensor 200. The blood vessel that scatters the measurement light 340 is not limited to the artery 330. The sensor 200 may detect scattered light 350 scattered by another blood vessel of the subject. The artery 330 and other blood vessels are collectively referred to as a predetermined blood vessel of the subject.

  The light emitting unit 220 may emit near-infrared light as the measurement light 340. The near-infrared light easily reaches from the body surface 310 to the deeply located artery 330. By detecting the scattered light 350 from the artery 330, the accuracy of pulse wave detection may be higher.

  By mounting the light emitting unit 220 and the light receiving unit 230 in the package 210, the distance between the light emitting unit 220 and the light receiving unit 230 can be reduced. Since the distance between the light emitting unit 220 and the light receiving unit 230 is small, the angle between the direction from the light emitting unit 220 toward the artery 330 and the direction from the artery 330 to the light receiving unit 230 can be reduced.

  As shown in FIG. 5, even when the mounting position of the measuring device 100 is shifted due to the plurality of sensors 200 intersecting with predetermined blood vessels of the subject, any of the sensors 200 can detect biological information from the predetermined blood vessels. Is more likely to be obtained. In other words, the mounting position where biological information can be acquired from a predetermined blood vessel by the sensor 200 can be wider.

  By mounting the sensor 200 on the flexible substrate 250, each sensor 200 can be mounted such that the surface on which the light emitting unit 220 and the light receiving unit 230 are mounted is along the body surface 310 of the subject. As a result, the length of the optical path from the light emitting unit 220 to the light receiving unit 230 via the artery 330 can be shortened. By increasing the amount of the scattered light 350 incident on the light receiving unit 230, the light emitting unit 220 can reduce the intensity of the measurement light 340 and reduce power consumption.

  As shown in FIGS. 2 to 5, the plurality of sensors 200 are arranged and mounted on a flexible substrate 250. The plurality of sensors 200 may be arranged such that the light emitting units 220 and the light receiving units 230 are alternately arranged. This increases the possibility that any of the sensors 200 can acquire biological information from a predetermined blood vessel. The point at which the direction in which the sensors 200 are arranged and the predetermined blood vessel intersect with each other is easily specified as the position at which the sensor 200 acquires the biological information of the subject. The position at which the sensor 200 acquires the biological information of the subject is also referred to as the biological information acquisition point of the sensor 200.

  The plurality of sensors 200 may be arranged at a pitch smaller than 6 mm. The plurality of sensors 200 may be arranged three or more. This increases the possibility that any of the sensors 200 can acquire biological information from a predetermined blood vessel.

  The plurality of sensors 200 may be arranged in a direction crossing the direction in which the light emitting unit 220 and the light receiving unit 230 are arranged. When the length of the sensor 200 in the direction in which the light emitting unit 220 and the light receiving unit 230 are arranged is longer than the length in the direction orthogonal to the direction, the sensors 200 can be arranged at a smaller pitch.

  As shown in FIG. 6, the measuring device 100 includes a first sensor 201, a second sensor 202, and a third sensor 203 as the plurality of sensors 200. The plurality of sensors 200 are mounted on the flexible substrate 250. The number of sensors 200 is not limited to three, but may be two or four or more. The measurement device 100 further includes a control unit 400, a storage unit 410, and a communication unit 420. The control unit 400, the storage unit 410, and the communication unit 420 are mounted on a rigid board 450. The flexible substrate 250 and the rigid substrate 450 are also collectively referred to as a flexible rigid substrate 460.

  As illustrated in FIG. 7, the control unit 400, the storage unit 410, and the communication unit 420 may be mounted on the flexible board 250 together with the plurality of sensors 200.

  As shown in FIGS. 6 and 7, the control unit 400 is connected to each component of the measurement device 100. The control unit 400 may be a processor that controls and manages each component of the measurement device 100 and the entire measurement device 100. The control unit 400 may be a processor such as a CPU (Central Processing Unit) that executes a program defining a control procedure. The program may be stored in a storage medium such as the storage unit 410, for example.

  The control unit 400 outputs control information for causing the light emitting unit 220 to emit the measurement light 340 to each sensor 200. The control unit 400 acquires, from each of the sensors 200, the biological information of the subject detected based on the scattered light 350 received by the light receiving unit 230.

  The control unit 400 may calculate the subject's pulse wave based on the subject's biological information acquired from the sensor 200. The pulse wave may be represented as a waveform of a change in pressure or volume of a blood vessel transmitted in accordance with the heartbeat. For example, as shown in FIG. 8, a pulse wave waveform 500 of the subject is represented by a plot of a temporal change in the output of the light receiving unit 230.

  Pulse waveform 500 is divided into a pre-ejection period 510, a systole 520, and a diastole 530. The pre-ejection period 510 is a period from the start of contraction of the heart until blood is actually pumped. The pulse waveform 500 in the pre-ejection period 510 has a different shape depending on the motion of the heart. The systole 520 is a period during which blood is pumped from the ventricle. The diastole 530 is the time when blood flows from the atrium into the ventricle.

  Pulse waveform 500 has several characteristic points. The characteristic point is, for example, a shock wave 540, a tidal wave 550, or an overlapping notch 560. The shock wave 540 is a wave generated by the ejection of blood from the ventricle. The tidal wave 550 is a wave generated by reflection from an artery or the like in the lower body. The double notch 560 is a wave that occurs in response to the closing of the aortic valve and appears at the end of the systole 520.

  The control unit 400 may calculate the pulse rate or the heart rate of the subject based on the acquired pulse wave. Normally, the pulse rate and the heart rate have the same value, so the same is used here, and the following description is the heart rate. The control unit 400 may calculate other information related to the physical condition of the subject based on the acquired biological information.

  The storage unit 410 stores various information, programs for operating the measuring apparatus 100, and the like. The storage unit 410 may be configured by a semiconductor memory, a magnetic memory, or the like. The storage unit 410 may function as a work memory of the control unit 400. The storage unit 410 may store biological information of the subject acquired from the sensor 200. The storage unit 410 may store information related to the pulse wave or the heart rate calculated by the control unit 400.

  The communication unit 420 transmits and receives various types of information to and from an external device such as a server by wired or wireless communication. The communication unit 420 may include a communication interface such as a LAN (Local Area Network) or a CAN (Control Area Network). The communication unit 420 may be able to communicate with an external device by wire or wirelessly. The communication unit 420 may transmit the biological information acquired from the sensor 200 to an external device such as a server. The communication unit 420 may transmit information related to the pulse wave or the heart rate calculated by the control unit 400 to an external device such as a server.

  The notification unit 130 displays information related to the biological information of the subject acquired by the control unit 400. The notification unit 130 may display information related to the pulse wave or the heart rate calculated by the control unit 400. The notification unit 130 may display information such as an alarm for the subject.

  The notification unit 130 may include a display device such as a liquid crystal, an organic EL (Electro-Luminescence), an inorganic EL, or an LED (Light Emission Diode). The notification unit 130 may include a device that emits sound. The notifying unit 130 may notify the subject or people around the subject of information such as an alarm by emitting a sound based on the control information acquired from the control unit 400. The notification unit 130 may include a device that generates vibration. The notification unit 130 may notify the subject of information such as an alarm by generating vibration based on the control information acquired from the control unit 400. The notification unit 130 outputs information such as an alarm to the subject or the people around the subject by any method other than voice or vibration that the subject or the people around the subject can recognize. You may report.

[Biological information acquisition flow]
The measurement apparatus 100 causes the control unit 400 to execute, for example, the measurement method shown in the flowchart of FIG. 9 to acquire the biological information of the subject. In the measurement method illustrated in FIG. 9, the plurality of sensors 200 are the first sensor 201 to the third sensor 203. The measurement method according to the present embodiment can be applied to a case where the number of sensors 200 is two or four or more.

  The control unit 400 sets the counter (k) to 1 as a parameter for specifying one of the plurality of sensors 200 (Step S11).

  The control section 400 turns on the light emitting section 220 of the k-th sensor (step S12). When k = 1, the control unit 400 turns on the light emitting unit 220 of the first sensor 201. When k = 2, the control unit 400 turns on the light emitting unit 220 of the second sensor 202. The same applies when k is a value of 3 or more.

  The control unit 400 acquires the output of each sensor 200. The control unit 400 acquires biological information based on the output of each sensor 200 (Step S13). The biological information acquired based on the output of the sensor 200 is also referred to as the biological information of the sensor 200. The control unit 400 acquires not only the output of the sensor 200 whose light emitting unit 220 is lit, but also the output of another sensor 200. The control unit 400 acquires, for example, a time change of the output of each sensor 200 as a pulse wave of each sensor 200.

  The control unit 400 selects one from the biological information of each sensor 200 (Step S14). The control unit 400 may store the selected one piece of biological information in the storage unit 410. If k = 1, the control section 400 proceeds to Step S15.

  When k = 2, the control unit 400 selects one biometric information from the biometric information of each sensor 200 when k = 2 and one biometric information when k = 1. , One biological information is selected. Similarly, in the case where k = i (i ≧ 3), the control unit 400 sets one piece of biometric information from the biometric information of each sensor 200 when k = i and k = i−1. Sometimes, one piece of biological information is selected from one piece of selected biological information. In other words, the control unit 400 selects one piece of biometric information from the biometric information acquired earlier and the biometric information corresponding to the light-emitting unit 220 currently lit.

  When the biological information is a pulse wave, the control unit 400 may select one pulse wave based on the maximum pulse wave height. When the biological information is a pulse wave, the control unit 400 may select one pulse wave based on the fact that the characteristic point of the pulse wave is most clearly displayed. The control unit 400 may select one piece of biological information of the sensor 200 based on the acquired output of each sensor 200.

  The control section 400 turns off the light emitting section 220 of the k-th sensor (step S15).

  The control unit 400 performs an operation of k = k + 1 (step S16). In other words, the control unit 400 adds 1 to the value of the counter (k).

  The control unit 400 determines whether the value of the counter (k) is larger than the number of the sensors 200 (Step S17). In other words, control unit 400 determines whether or not the conditional expression k> (the number of sensors 200) is satisfied. When the conditional expression k> (the number of sensors 200) is not satisfied (step S17: NO), the control unit 400 returns to step S12. The control unit 400 repeats the processing of steps S12 to S16 until the conditional expression of k> (number of sensors 200) is satisfied. When the conditional expression k> (the number of sensors 200) is satisfied (step S17: YES), the control section 400 ends the flowchart of FIG.

  The measuring device 100 according to the present embodiment is mounted so that the surface on which the light emitting unit 220 and the light receiving unit 230 of each sensor 200 are mounted faces the artery 330 inside the body surface 310 of the subject. Can be done. In this case, the angle formed by the optical path of the central ray of the measurement light 340 emitted from the light emitting unit 220 and the optical path of the measurement light 340 toward the artery 330 may be small. The angle between the optical path of the scattered light 350 traveling from the artery 330 to the light receiving unit 230 and the normal to the light receiving surface of the light receiving unit 230 may be small. As a result, the lengths of the optical paths of the measurement light 340 and the scattered light 350 between each sensor 200 and the artery 330 may be shortened. The measurement light 340 emitted from the light emitting unit 220 may easily reach the artery 330 located deep in the subject. The scattered light 350 scattered by the artery 330 is likely to enter the light receiving unit 230. Biological information from the subject is more easily obtained.

[Physical condition judgment based on pulse wave]
The measurement device 100 may determine the physical condition of the subject based on the pulse wave acquired as the biological information, for example, as illustrated in FIG.

  The control unit 400 acquires a pulse wave of the subject (Step S21). The control unit 400 may cause the sensor group 120 to detect a pulse wave. The control unit 400 may cause the sensor group 120 to detect biological information, and calculate a pulse wave of the subject based on the biological information. The control unit 400 may store the acquired pulse wave in the storage unit 410. The acquisition of the pulse wave may be performed continuously over a predetermined time.

  The control unit 400 analyzes the pulse wave (Step S22). The control unit 400 may calculate, for example, a pulse wave rising interval. The control unit 400 may store the calculated pulse wave rising interval in the storage unit 410.

  The control unit 400 may calculate the number of rises of the pulse wave per minute as the heart rate from the rise interval of the pulse wave. The control unit 400 may calculate the rising interval of the pulse wave based on the characteristic point of the waveform of the pulse wave. The control unit 400 may analyze an inflection point when the pulse wave rises toward the peak value as the characteristic point of the pulse wave waveform. The control unit 400 may calculate the time interval at which the inflection point of the pulse wave appears as the pulse wave interval. The control unit 400 may use the peak value or the bottom value of the pulse wave as a reference as the characteristic point of the pulse wave waveform. The control unit 400 may analyze the characteristic points of the pulse wave waveform, such as the shock wave 540, the tidal wave 550, or the overlapping notch 560 shown in FIG. The control unit 400 may calculate the interval at which the peak value or the bottom value of the pulse wave appears as the interval of the pulse wave. The heart rate may be calculated based on, for example, a pulse wave continuously acquired for 10 seconds or more.

  The control unit 400 may calculate the rate of change in the heart rate of the subject. The reference value for calculating the fluctuation rate may be, for example, the heart rate of the subject in normal times. The reference value for calculating the fluctuation rate may be the heart rate calculated first after the subject gets on the moving object. The control unit 400 may store the calculated heart rate variability in the storage unit 410. The heart rate variability may be a heart rate increase rate or a heart rate decrease rate. The heart rate variability may be calculated based on, for example, pulse waves continuously acquired over three minutes or more.

  The control unit 400 may calculate the pulse height of the pulse wave. The control unit 400 may analyze characteristic points of the pulse wave waveform. The control unit 400 may store the analysis result of the pulse height of the pulse wave or the characteristic point of the waveform in the storage unit 410.

  The control unit 400 determines the physical condition of the subject based on the analysis result of the pulse wave. The control unit 400 determines whether the rate of decrease in the heart rate of the subject is equal to or greater than the sleepiness determination value (Step S23). The drowsiness determination value is a reference value for determining the drowsiness of the subject. The sleepiness determination value is set to, for example, 15%, but is not limited thereto. The drowsiness determination value is a value that can be set as appropriate. When the rate of decrease in the heart rate of the subject is equal to or greater than the sleepiness determination value, the control unit 400 determines that the sleepiness of the subject is increasing as the determination of the physical condition of the subject.

  In step S23, the control unit 400 may determine sleepiness of the subject based on the pulse wave frequency analysis result. For example, when the value of the predetermined frequency band of the pulse wave increases, the control unit 400 may determine that the drowsiness of the subject is increasing.

  When the decrease rate of the heart rate of the subject is equal to or greater than the sleepiness determination value (step S23: YES), the control unit 400 alerts the subject that the sleepiness is occurring from the notification unit 130. Is performed (step S24). After step S24, control unit 400 ends the process of the flowchart in FIG. The control unit 400 may return to step S21 and continue monitoring the state of the subject.

  When the rate of decrease in the heart rate of the subject is not equal to or greater than the sleepiness determination value (step S23: NO), the control unit 400 determines whether the rate of increase in the heart rate of the subject is equal to or greater than the tension determination value. (Step S25). The tension determination value is a reference value for determining the degree of tension of the subject. The tension determination value is set to, for example, 25%, but is not limited to this. The tension determination value is a value that can be set as appropriate. When the rate of increase in the heart rate of the subject is equal to or greater than the tension determination value, the control unit 400 determines that the tension of the subject is increasing as a determination of the physical condition of the subject.

  In step S25, the control unit 400 may determine that the tension of the subject is increasing when the heart rate of the subject becomes equal to or more than the predetermined value. The predetermined value may be set to, for example, 100 times / minute.

  When the rate of increase in the heart rate of the subject is equal to or greater than the tension determination value (step S25: YES), the control unit 400 notes that the notification unit 130 has increased the degree of tension with respect to the subject. A call is made (step S26). After step S26, control unit 400 proceeds to step S27.

  When the rate of increase in the heart rate of the subject is not equal to or greater than the tension determination value (step S25: NO) or after step S26, the control unit 400 determines the physical condition of the subject and determines the physical condition of the subject. It is determined whether the analysis result of the pulse wave satisfies the arrhythmia determination condition (step S27). The arrhythmia determination condition is set, for example, as a case where the variation of the rising interval of the pulse wave is equal to or more than a predetermined value. The arrhythmia determination condition may be set as the case where the pulse height of the pulse wave decreases. The arrhythmia determination condition may be set as a case where the difference between the pulse waveform of the subject and the reference waveform is equal to or greater than a predetermined value.

  When the pulse wave analysis result of the subject satisfies the arrhythmia determination condition (step S27: YES), the control unit 400 alerts the subject that the arrhythmia has occurred to the subject (step S27: YES). Step S28). After step S28, control unit 400 ends the processing of the flowchart in FIG. The control unit 400 may return to step S21 and continue monitoring the state of the subject.

  When the pulse wave analysis result of the subject does not satisfy the arrhythmia determination condition (step S27: NO), the control unit 400 ends the processing of the flowchart in FIG. The control unit 400 may return to step S21 and continue monitoring the state of the subject.

  In FIG. 10, the sleepiness determination in step S23, the tension determination in step S25, and the arrhythmia determination in step S27 may be executed in a different order.

  According to the physical condition determination flow shown in FIG. 10, the physical condition of the subject can be determined based on the pulse wave. By doing so, anxiety about a change in the physical condition held by the subject can be reduced. When the subject is driving the moving body, the moving body can be driven more safely by being notified of the change in the physical condition.

(Embodiment 2)
As illustrated in FIG. 11, the measurement device 100 according to the second embodiment may include two sensor groups 120. Compared to FIG. 1, the sensor holding unit 110 further includes a first sensor group 121 and a second sensor group 122. The first sensor group 121 and the second sensor group 122 are also referred to as a sensor group 120, respectively.

  As shown in FIG. 12, the first sensor group 121 includes an eleventh sensor 2011, a twelfth sensor 2012, and a thirteenth sensor 2013. The second sensor group 122 includes a twenty-first sensor 2021, a twenty-second sensor 2022, and a twenty-third sensor 2023. The eleventh sensor 2011, the twelfth sensor 2012, the thirteenth sensor 2013, the twenty-first sensor 2021, the twenty-second sensor 2022, and the twenty-third sensor 2023 are each also referred to as a sensor 200. The configuration of each sensor 200 is the same as the configuration of the sensor 200 in the first embodiment. The control unit 400 is connected to the first sensor group 121 and the second sensor group 122, and controls each sensor group 120. The storage unit 410, the communication unit 420, and the notification unit 130 are the same as those shown in FIGS.

<Measurement of pulse wave velocity>
The measurement device 100 according to the present embodiment is configured such that the plurality of sensor groups 120 are arranged in a direction along a predetermined blood vessel of the subject in a state where the mounting unit 140 is worn on the body of the subject. Good. The measurement apparatus 100 can acquire a pulse wave from a predetermined blood vessel by each of the first sensor group 121 and the second sensor group 122. When the first sensor group 121 and the second sensor group 122 acquire a pulse wave at a position separated by a predetermined distance, the pulse wave propagation velocity can be measured. For example, when the first sensor group 121 and the second sensor group 122 are arranged so as to match the predetermined artery on the radial artery of the wrist, the control unit 400 can calculate the pulse wave propagation velocity of the radial artery. The pulse wave velocity is also called PWV (Pulse Wave Velocity). The predetermined blood vessel is not limited to the radial artery, and may be various other blood vessels.

  An intermediate point between the light emitting unit 220 and the light receiving unit 230 that operates when the sensor group 120 acquires a pulse wave from a predetermined blood vessel is also referred to as a pulse wave acquisition point. A position where a pulse wave is measured in a predetermined blood vessel is also referred to as a measurement position. The distance between the first sensor group 121 and the second sensor group 122 may be the distance between the pulse wave acquisition points of each sensor group 120. When the sensors 200 are arranged such that the light emitting units 220 and the light receiving units 230 are alternately arranged, the light emitting units 220 and the light receiving units 230 cross predetermined blood vessels. In this case, the pulse wave acquisition point can be determined as a point closer to the measurement position.

  When the first sensor group 121 and the second sensor group 122 are attached to the subject so as to be along the same artery 330, the control unit 400 uses the first sensor group 121 and the second sensor group 122 to control the same artery 330. Pulse wave can be obtained. The pulse wave A shown in FIG. 13A is acquired by the first sensor group 121. The pulse wave B shown in FIG. 13B is acquired by the second sensor group 122. 13, the horizontal axis and the vertical axis represent the time and the output of the light receiving unit 230, respectively. The output of the light receiving section 230 is also called power Pa.

  The waveforms of the pulse waves shown in FIGS. 13A and 13B are synchronized at time. In FIG. 13A, the time at which the pulse wave A reaches the peak value is indicated by a chain line. In FIG. 13B, the time at which the pulse wave B reaches a peak value is indicated by a dashed line. In FIG. 13B, the time at which the pulse wave A reaches a peak value is also indicated by a dashed line. The difference between the times corresponding to the two dashed lines shown in FIG. 13B indicates the time during which the pulse wave propagates from the position of the first sensor group 121 to the position of the second sensor group 122. The time during which a pulse wave propagates over a predetermined distance is also referred to as a pulse wave propagation time. The pulse wave transit time is also called PTT (Pulse Transit Time). In the example of FIG. 13, PTT is ΔT (second).

When the distance from the position of the first sensor group 121 to the position of the second sensor group 122 is ΔD (m), PWV is calculated by the following equation (1).
PWV (m / sec) = ΔD / ΔT (1)

[Biological information acquisition flow]
The measurement apparatus 100 causes the control unit 400 to execute, for example, the measurement method shown in the flowchart of FIG. 14 to acquire the biological information of the subject. The measurement method according to the present embodiment can be applied not only when the number of sensors 200 included in the sensor group 120 is three, but also when the number is two or four or more.

  The control unit 400 acquires the biological information of the subject using the first sensor group 121 according to the procedure shown in FIG. 9 (Step S31).

  The control unit 400 performs the processing of steps S32 to S38 of FIG. 14 similarly to the processing of steps S11 to S17 of FIG. Steps S32, S34, and S36 to S38 are respectively the same as step S11, step S13, and steps S15 to S17 in FIG.

  In step S33 of FIG. 14, the control unit 400 turns on the light emitting unit 220 of the k-th sensor of the second sensor group 122.

  In step S35 of FIG. 14, the control unit 400 selects one from the biological information of each sensor 200 of the second sensor group 122. The difference from step S14 in FIG. 9 is that the control unit 400 selects the biological information of the second sensor group 122 based on the biological information acquired by the first sensor group 121.

  The control unit 400 may select, from the biological information of each sensor 200, the biological information having the highest correlation with the biological information acquired by the first sensor group 121. When acquiring a pulse wave as the biological information, the control unit 400 determines a phase between the waveform of the pulse wave acquired by the first sensor group 121 and the waveform of the pulse wave acquired by each sensor 200 of the second sensor group 122. The relation number may be calculated. The control unit 400 may select a pulse wave having the largest correlation coefficient as the pulse wave of the second sensor group 122. The correlation coefficient of the pulse wave may be calculated based on the characteristic points of the waveform. For example, emphasis may be placed on the interval between the peak values of the pulse wave waveform, or on the shape of the inflection point of the pulse wave.

  The control unit 400 can calculate PTT or PWV based on the pulse wave acquired by the first sensor group 121 and the pulse wave acquired by the second sensor group 122. When the correlation coefficient between the pulse wave acquired by the first sensor group 121 and the pulse wave acquired by the second sensor group 122 is large, a feature point serving as a PTT calculation reference can be easily determined. The accuracy of PTT calculation may be higher.

  The control unit 400 may select the pulse wave of the second sensor group 122 based on the same reference as in step S14 of FIG.

[Judgment of body condition by pulse wave and PTT]
As illustrated in FIG. 15, the control unit 400 may determine the physical condition of the subject based on the pulse wave and the pulse wave transit time. The measurement device 100 according to the present embodiment can measure PTT by including two sensor groups 120. The predetermined distance in the present embodiment is the distance between the pulse wave acquisition point of the first sensor group 121 and the pulse wave acquisition point of the second sensor group 122. The predetermined distance is determined by the mounting positions of the first sensor group 121 and the second sensor group 122 in the measuring device 100. In the present embodiment, the PTT measured by the control unit 400 causes the pulse wave to propagate from the measurement position corresponding to the pulse wave acquisition point of the first sensor group 121 to the measurement position corresponding to the pulse wave acquisition point of the second sensor group 122. Time.

  The control unit 400 acquires a pulse wave as biological information of the subject by the first sensor group 121 or the second sensor group 122 (Step S41). The method of acquiring the pulse wave is the same as that in step S21 in FIG. The control unit 400 may acquire a pulse wave by one of the first sensor group 121 and the second sensor group 122. The control unit 400 may acquire the pulse wave by both the first sensor group 121 and the second sensor group 122, and select one of the pulse waves based on the characteristic point of the pulse wave.

  The control unit 400 analyzes the pulse wave (Step S42). The pulse wave is analyzed in the same manner as in step S22 in FIG.

  The control unit 400 determines whether the rate of decrease in the heart rate of the subject is equal to or greater than the sleepiness determination value (Step S43). The drowsiness determination method is the same as step S23 in FIG.

  When the decrease rate of the heart rate of the subject is equal to or greater than the sleepiness determination value (step S43: YES), the control unit 400 alerts the subject that the sleepiness is occurring from the notification unit 130. Is performed (step S44). After that, the control unit 400 ends the process of the flowchart in FIG. The control unit 400 may return to step S41 and continue to determine the physical condition of the subject.

  When the rate of decrease in the heart rate of the subject is not equal to or greater than the sleepiness determination value (step S43: NO), the control unit 400 determines whether the rate of increase in the heart rate of the subject is equal to or greater than the tension determination value. (Step S45). The tension determination method is the same as step S25 in FIG.

  When the rate of increase in the heart rate of the subject is equal to or higher than the tension determination value (step S45: YES), the control unit 400 proceeds to step S47.

  When the rate of increase in the heart rate of the subject is not equal to or greater than the tension determination value (step S45: NO), the control unit 400 determines the physical condition of the subject and analyzes the pulse wave of the subject. Satisfies the arrhythmia determination condition (step S46). The arrhythmia determination method is the same as step S27 in FIG.

  When the pulse wave analysis result of the subject satisfies the arrhythmia determination condition (step S46: YES), the control unit 400 proceeds to step S47. When the pulse wave analysis result of the subject does not satisfy the arrhythmia determination condition (step S46: NO), the control unit 400 ends the processing of the flowchart in FIG. The control unit 400 may return to step S41 and continue to determine the physical condition of the subject.

  When the process proceeds to step S47 based on the result of the determination of the physical condition of the subject in step S45 or step S46, the control unit 400 measures the PTT of the subject (step S47). The control unit 400 acquires a pulse wave by both the first sensor group 121 and the second sensor group 122, and calculates PTT based on the characteristic points of the pulse wave.

  The control unit 400 analyzes the PTT (Step S48). The control unit 400 calculates the variation of the parameter based on the PTT by analyzing the PTT. The parameter based on the PTT is biological information of the subject that can be calculated or estimated using the PTT. The parameters based on PTT include, for example, PTT, PWV, blood pressure, and the like. The control unit 400 calculates, for example, the rate of change of the PTT from the reference value. The reference value may be a normal PTT of the subject. The reference value may be the PTT at the time when the subject wears the measuring device 100.

The control unit 400 may estimate the blood pressure of the subject as a parameter based on the PTT. The control unit 400 may estimate the blood pressure of the subject using the relationship between the PTT of the subject and the blood pressure. The relationship between the subject's PTT and the blood pressure may be determined in advance, or may be sequentially determined by the control unit 400. The estimated value of blood pressure may be systolic blood pressure (systolic blood pressure) or diastolic blood pressure (diastolic blood pressure). The blood pressure estimate may be an average blood pressure. The average blood pressure is represented by the following equation (2) using, for example, a systolic blood pressure and a diastolic blood pressure.
(Mean blood pressure) = (systolic blood pressure + diastolic blood pressure x 2) / 3 (2)

  The control unit 400 determines whether the parameter based on the PTT has changed by a predetermined value. The control unit 400 determines whether the rate of change of the subject's PTT is within a predetermined range (step S49). The PTT change rate is also referred to as a PTT change rate. The predetermined range is, for example, a range of ± 25% around the reference value. The predetermined range is not limited to this, and can be determined as appropriate.

  The control unit 400 may determine whether the estimated value of the blood pressure of the subject is within a predetermined range. In this case, the predetermined range may be, for example, a range of ± 20 mmHg around the normal blood pressure of the subject. Also in this case, the predetermined range can be appropriately determined.

  When the PTT fluctuation rate is within the predetermined range (step S49: YES), the control unit 400 alerts the subject that the degree of tension is increasing or that an arrhythmia has occurred from the notification unit 130. Perform (Step S50). When the control unit 400 proceeds to step S47 due to the increase rate of the heart rate of the subject being equal to or greater than the tension determination value in step S45, the control unit 400 transmits the degree of tension from the notification unit 130 to the subject in step S50. To warn that is increasing. If the result of the pulse wave analysis of the subject satisfies the arrhythmia determination condition in step S46, the control unit 400 proceeds to step S47. In step S50, the notification unit 130 generates an arrhythmia for the subject. Alerts you that After that, the control unit 400 ends the process of the flowchart in FIG. The control unit 400 may return to step S41 or step S47 and continue to determine the physical condition of the subject.

  If the PTT variation rate is not within the predetermined range (step S49: NO), control unit 400 determines that the parameter based on the PTT has undergone a predetermined variation. When the PTT fluctuation rate is not within the predetermined range, the control unit 400 determines that the disease risk of the subject has increased. The control unit 400 notifies the notification unit 130 that the parameter based on the PTT has changed by a predetermined amount, and warns that the disease risk of the subject is increasing (step S51). When the parameter based on the PTT fluctuates by a predetermined amount, the control unit 400 may notify information on the disease risk of the subject. The control unit 400 may transmit information related to the PTT fluctuation rate or information related to the alert from the communication unit 420 to the external device. After that, the control unit 400 ends the process of the flowchart in FIG. The control unit 400 may return to step S41 or step S47 and continue to determine the physical condition of the subject.

  In the flowchart of FIG. 15, the control unit 400 may execute the processing in step S43, step S45, and step S46 by appropriately changing the order.

  In the flowchart of FIG. 15, the control unit 400 may use PWV instead of PTT as a parameter based on PTT. Control unit 400 may use a blood pressure estimated from PTT as a parameter based on PTT. The control unit 400 may use various parameters based on PTT or variations thereof as parameters based on PTT.

(Embodiment 3)
Each part of the package 210 shown in FIG. 16 is the same as that shown in FIG. As shown in FIG. 16, a surface extending from the first bottom surface 214c is indicated by a broken line. The first side surface 214a is inclined at a first inclination angle 2141a with respect to the first bottom surface 214c. The second side surface 214b is inclined at a second inclination angle 2141b with respect to the first bottom surface 214c.

  The light emitting unit 220 emits the measurement light 340 indicated by a broken line. The measurement light 340 includes the measurement light 340a emitted toward the first side 214a and the measurement light 340b emitted toward the second side 214b.

  The first inclination angle 2141a is smaller than the second inclination angle 2141b. In other words, the inclination angle of the first side surface 214a with respect to the first bottom surface 214c is smaller than the inclination angle of the second side surface 214b with respect to the first bottom surface 214c. The measurement light 340a is less likely to be incident on the first side surface 214a than when the first inclination angle 2141a is equal to or greater than the second inclination angle 2141. The measurement light 340a is likely to be emitted to the outside of the first concave portion 214 while facing the first side surface 214a.

  At least a part of the measurement light 340b does not enter the second side surface 214b, and can be emitted to the outside of the first concave portion 214 while facing the second side surface 214b. At least a part of the measurement light 340b enters the second side surface 214b and is reflected by the second side surface 214b. When the second side surface 214b is covered with the metallization layer 212 as shown in FIG. 4, the measurement light 340b is easily reflected on the second side surface 214b. The measurement light 340b reflected by the second side surface 214b is shown as the measurement light 340c. The measurement light 340 changes its direction toward the first side surface 214a and is emitted outside the first concave portion 214.

  As shown in FIG. 17, the package 210 has a second recess 216 on the first side 214a side of the first recess 214 shown in FIG. The light receiving section 230 is mounted on the second bottom surface 216c of the second recess 216. The measurement apparatus 100 having the package 210 is mounted on the subject such that the surface on which the light emitting unit 220 and the light receiving unit 230 are mounted faces the artery 330.

  The measurement light 340 is scattered by the artery 330 and becomes scattered light 350. Measurement light 340 includes measurement lights 340a and 340c. The scattered light 350 includes scattered light 350a in which the measurement light 340a is scattered and scattered light 350c in which the measurement light 340c is scattered.

  Of the scattered light 350 in which the measurement light 340 is scattered by the artery 330, the scattered light 350 traveling in the direction in which the measurement light 340 is reflected by the artery 330 may increase. As the measurement light 340 emitted toward the first side surface 214a to the outside of the first concave portion 214 increases, the scattered light 350 reaching the light receiving section 230 from the artery 330 may increase. As shown in FIG. 16, when the first inclination angle 2141a is smaller than the second inclination angle 2141b, the amount of scattered light 350 reaching the light receiving unit 230 from the artery 330 can be increased. The measurement light 340 can be reduced. The power consumption of the light emitting unit 220 can be reduced.

  As shown in FIG. 18, the package 210 may have a plurality of first concave portions 214. The light emitting unit 220 may be mounted in each of the first recesses 214. The package 210 may have a plurality of second recesses 216. The light receiving section 230 may be mounted in each of the second recesses 216.

  The first recess 214 may be sandwiched on both sides by the second recess 216. As shown in FIGS. 3 and 4, the first side surface 214 a is defined as a side surface located closer to the second recess 216. In the case of FIG. 18, both of the side surfaces of the first concave portion 214 may be the first side surface 214a. Also in this case, the first inclination angle 2141a of the first side surface 214a may be smaller than the second inclination angle 2141b of the second side surface 214b. By doing so, the scattered light 350 in which the measurement light 340 is scattered by the artery 330 can easily reach the light receiving unit 230. As a result, the light emitting unit 220 can lower the intensity of the measurement light 340 and reduce power consumption.

  The package 210 having the plurality of first recesses 214 can be made longer than a package having one first recess 214. The long package 210 may be mounted on a relatively flat portion of the subject's body surface 310.

(Embodiment 4)
As shown in FIG. 19, the measurement system 700 includes the measurement device 100 and a server 600.

  The measurement device 100 includes a control unit 400, a storage unit 410, a communication unit 420, and a notification unit 130. The measuring device 100 in FIG. 19 may be the measuring device 100 described in the first to third embodiments.

  The server 600 includes a server control unit 610, a server storage unit 620, and a server communication unit 630.

  The server control unit 610 may be a processor that controls and manages each component of the server 600 and the entire server 600. The server control unit 610 may be a processor such as a CPU that executes a program or the like defining a control procedure. The program may be stored in a storage medium such as the server storage unit 620, for example.

  The server storage unit 620 stores various information, programs for operating the server 600, and the like. The server storage unit 620 may be configured by a semiconductor memory, a magnetic memory, or the like. The server storage unit 620 may function as a work memory of the server control unit 610. The server storage unit 620 may store information obtained from the measurement device 100.

  The server communication unit 630 may include a communication interface such as a LAN or a CAN. The server communication unit 630 may be communicably connected to the measurement device 100 by wire or wirelessly. The server communication unit 630 may be connected to the measurement device 100 via a network. The measurement device 100 may be connected to a network by wireless communication such as a wireless LAN. The measurement device 100 may be connected to a network by wired communication.

  The measurement device 100 is communicably connected to the server 600. The communication unit 420 and the server communication unit 630 may be communicably connected to each other by wire or wirelessly. The measurement device 100 may output the measured biological information to the server 600. The server 600 may determine the physical condition of the subject based on the biological information acquired from the measuring device 100, for example, according to the procedure shown in FIGS. The server 600 may output information on the physical condition of the subject to the measurement device 100. The measurement device 100 may acquire information on the physical condition of the subject based on the biological information from the server 600. The measurement device 100 may notify the subject by the notification unit 130 based on the information on the physical condition of the subject acquired from the server 600.

  The configuration according to the present disclosure is not limited to the above-described embodiment, and various modifications or changes are possible. For example, the functions and the like included in each component can be rearranged so as not to be logically inconsistent, and a plurality of components and the like can be combined into one or divided.

  In measurement device 100 according to the present disclosure, the side surface of first concave portion 214 may have a shape having a lens function. In this way, the emission direction of the measurement light 340 can be controlled. The side surface of the second concave portion 216 may have a shape having a lens function. This makes it easier for the scattered light 350 to enter the light receiving section 230.

REFERENCE SIGNS LIST 100 measuring device 110 sensor holding unit 112 exterior member 114 sensor buffering member 116 test portion buffering member 120 sensor group 121 first sensor group 122 second sensor group 130 reporting section 140 mounting section 200 sensor 201 to 203 first to third sensor 210 package 212 metallization layer 214 first concave portion 214a first side surface 214b second side surface 214c first bottom surface 216 second concave portion 216a third side surface 216b fourth side surface 216c second bottom surface 217 base portion 218 mounting portion 220 light emitting portion 220a, 220b light emission Element 230 Light receiving section 240 Cover 250 Flexible board 310 Body surface 320 Subcutaneous tissue 330 Artery 340 Measurement light 350 Scattered light 400 Control circuit 450 Rigid board 500 Pulse wave waveform 510 Pre-ejection period 520 Systole 530 Expansion Period 540 Shock wave 550 Sea wave 560 Duplicate notch 600 Server 610 Server control unit 620 Server storage unit 630 Server communication unit 700 Measurement system

Claims (12)

A light emitting unit for emitting measurement light,
A light receiving unit that detects scattered light according to the measurement light,
A package on which the light emitting unit and the light receiving unit are mounted,
The package has a first concave portion and a second concave portion,
The light emitting unit is mounted on a first bottom surface of the first recess,
The light receiving unit is mounted on a second bottom surface of the second recess,
The inclination angle of the first side surface of the first concave portion on the side closer to the second concave portion with respect to the first bottom surface is the same as that of the first side surface of the first concave portion on the second side surface farther from the second concave portion. rather smaller than the angle of inclination relative to the bottom surface,
An inclination angle of the second side surface with respect to the first bottom surface is smaller than 90 °;
Sensor. A light emitting unit that emits measurement light, a light receiving unit that detects scattered light according to the measurement light, and a sensor group including a plurality of sensors including a package on which the light emitting unit and the light receiving unit are mounted,
The package has a first concave portion and a second concave portion,
The light emitting unit is mounted on a first bottom surface of the first recess,
The light receiving unit is mounted on a second bottom surface of the second recess,
The inclination angle of the first side surface of the first concave portion on the side closer to the second concave portion with respect to the first bottom surface is the same as that of the first side surface of the first concave portion on the second side surface farther from the second concave portion. rather smaller than the angle of inclination relative to the bottom surface,
An inclination angle of the second side surface with respect to the first bottom surface is smaller than 90 °;
measuring device.   The measuring device according to claim 2, wherein the plurality of sensors are arranged and mounted on a flexible substrate.   The measurement device according to claim 3, wherein the plurality of sensors are mounted such that the light emitting units and the light receiving units are alternately arranged. Further comprising a mounting part to be mounted on the subject,
The measurement according to any one of claims 2 to 4, wherein the plurality of sensors are arranged in a direction crossing a predetermined blood vessel of the subject in a state where the mounting unit is worn on the subject. apparatus. Comprising a plurality of the sensor group,
The measuring device according to claim 5, wherein the plurality of sensor groups are arranged in a direction along a predetermined blood vessel of the subject in a state where the measuring device is mounted on the subject by the mounting portion.   The measuring device according to claim 2, wherein the plurality of sensors are arranged at a pitch smaller than 6 mm.   The measurement device according to claim 2, wherein three or more of the plurality of sensors are arranged. Further comprising a control unit,
The measurement device according to any one of claims 2 to 8, wherein the control unit detects biological information of a subject based on the scattered light.   The control unit according to claim 9, wherein, for each of the plurality of sensors, a pulse wave is detected as biological information of the subject, and at least one pulse wave is selected from the plurality of detected pulse waves. measuring device. A light emitting unit that emits measurement light, a light receiving unit that detects scattered light according to the measurement light, and a sensor group including a plurality of sensors including a package on which the light emitting unit and the light receiving unit are mounted,
A mounting part to be mounted on the subject,
Based on the scattered light, a measurement device having a control unit that detects biological information of the subject,
A server that determines a physical condition of the subject based on the biological information of the subject,
The package has a first concave portion and a second concave portion,
The light emitting unit is mounted on a first bottom surface of the first recess,
The light receiving unit is mounted on a second bottom surface of the second recess,
The inclination angle of the first side surface of the first concave portion on the side closer to the second concave portion with respect to the first bottom surface is the same as that of the first side surface of the first concave portion on the second side surface farther from the second concave portion. rather smaller than the angle of inclination relative to the bottom surface,
An inclination angle of the second side surface with respect to the first bottom surface is smaller than 90 °;
Measurement system.   A first sensor group and a second sensor group as the sensor group;
  Further comprising a control unit,
  The first sensor group and the second sensor group are arranged in a direction along a predetermined blood vessel of the subject while being mounted on the subject,
  3. The control unit according to claim 2, wherein the control unit selects the biological information having the highest correlation with the biological information acquired by the first sensor group from the biological information acquired by the sensors of the second sensor group. 4. measuring device.

Images